When a dominant allele coexists with a recessive allele in a heterozygote individual, how do they interact with each other?

Question

The dominant allele prevents expression of the recessive allele by an unknown mechanism.
They do not interact at all.
The dominant allele prevents transcription of the recessive allele.

Answer 1

In a heterozygote individual, where one allele is dominant and the other is recessive, the dominant allele typically expresses its trait, while the recessive allele's trait is not expressed.

The best option to describe this interaction is:

The dominant allele prevents expression of the recessive allele by an unknown mechanism.

This statement reflects the idea that the dominant allele takes precedence in determining the phenotype of the individual, while the recessive allele's influence is masked. It does not specifically involve preventing transcription, as both alleles may be transcribed, but the dominant allele's protein product often has a functional effect that overshadows the influence of the recessive allele.